What was the rate of growth of real GDP from 1960 to 2010?

For which of the following projects would it likely be most difficult to acquire 1,000 acres of land?

A) growing wheat B) building an amusement park C) building storage sheds D) digging wells

In constructing a production possibilities curve, all of the following are assumed EXCEPT

A. the time period involved is fixed. B. resources are fully employed. C. the quantity and quality of resources being used is fixed. D. the state of technology is improving.